ch 5 practice test

Which of the following is not useful to determine whether a clinical isolate is a bacterium, fungus, or protozoan?

a. its size under under a light microscopeb. whether it has a cell wallc. whether it can form protective structures under stressd.all of the above are reliableALL

The two major types of helminths based on body type are the _______, which include the tapeworms, and the _______, which are also known as nematodes.

flatworms; roundworms

In both eukaryotes and bacterial cells, ribosomes are responsible for the synthesis of ______.

proteins

Fungi have cell walls made of peptidoglycan.

t

Vegetative hyphae produce spores. Group startsTrue or False

t

Yeasts are _______ fungi, and molds are ________ fungi.

unicellular fillamentous

All microbes that are unicellular, photosynthetic, and motile are classified as protozoans. Group startsTrue or False

False. All protozoans are unicellular and most are motile, but not all are photosynthetic.

Which of these organisms has the best potential to survive in extreme environments?

Fungi

Which structure, found in most eukaryotes and often called an "extracellular matrix", can be used for attachment?

Glycocalyx

A mycelium is an intertwined mass of which type of fungal cells?

Hyphae

Select that statement that best describes the role of protozoan cysts.

Protozoan cysts are a survival form which allows them to survive adverse environmental conditions between hosts.

Amoeba utilize what structures for motility?

Pseudopods

What mitochondrial structures are the site of the enzymes and carriers used to make ATP in the electron transport system?

Cristae

In a helminth life cycle, which host harbors the adult, sexually active stage of the pathogen?

Definitive host

Which cytoskeletal fibers attach to and move chromosomes during mitosis?

Microtubules

What structure is found within the nucleus and is involved in the synthesis of ribosomal RNA?

Nucleolus

Which term most accurately describes a fungus growing on live human skin?

Parasite

Chloroplasts are the site of what process in eukaryotic cells?

Photosynthesis

Which of these groups causes the most casualties on an annual basis globally?

Protozoa

Fungi produce which structures for reproduction and multiplication?

Spores

Which group of protozoa is characterized by a lack of locomotive appendages and contains the pathogens of malaria and toxoplasmosis?

Sporozoa

The major difference between bacterial and eukaryotic cytoplasmic membranes is the presence of ______, which are molecules that are typically found in eukaryotic cytoplasmic membranes but lacking in bacterial cytoplasmic membranes.

Sterols

What structure is found within the nucleus and is involved in the synthesis of ribosomal RNA?

Sterols

Choose the statement that most accurately describes a typical helminth lifestyle.

The helminth reproduces sexually and spends most of its life in either a single animal host or a series of animal hosts.

In contrast to bacterial cell walls that contain peptidoglycan, eukaryotic cell walls are constructed of either ________.

chitin or cellulose

When environmental conditions become unfavorable, many protozoa produce _______.

cysts

Archaeal and bacterial cells use chloroplasts for the process of photosynthesis.

f